Motion Trajectory Tracking for Action Detection

2. The method of claim 1, wherein the set of selected images is based on a sum of the scores for each detected object in each respective image.

4. The method of claim 3, wherein the first and second subsets of images are combined in temporal order.

5. The method of claim 4, further comprising removing a first image from the first and second subsets of selected images based on how similar the first image is to neighboring images in the first and second subsets of selected image.

7. The method of claim 3, wherein selecting the second subset of images from the sequence of images based on the motion angles comprises selecting, for each detected object, images associated with a local maximum motion angle for the trajectory of each detected object.

8. The method of claim 1, further comprising discarding objects based on their respective confidence scores when a number of detected objects in an image in the sequence of images exceeds a threshold number of detected objects.

11. The method of claim 1, wherein the score comprises a traj ectory waypoint score and wherein the set of selected images is determined based on an aggregation of the scores.

13. The non-transitory program storage device of claim 12, wherein the set of selected images is based on a sum of the scores for each detected object in each respective image.

15. The non-transitory program storage device of claim 14, wherein the first and second subsets of images are combined in temporal order.

16. The non-transitory program storage device of claim 15, wherein the instructions further cause the one or more processors to remove a first image from the first and second subsets of selected images based on how similar the first image is to neighboring images in the first and second subsets of selected image.

18. The non-transitory program storage device of claim 14, wherein the instructions to select the second subset of images from the sequence of images based on the motion angles further cause the one or more processors to select, for each detected object, images associated with a local maximum motion angle for the trajectory of each detected object.

21. The non-transitory program storage device of claim 12, wherein the score comprises a trajectory waypoint score and wherein the set of selected images is determined based on an aggregation of the scores.

23. The device of claim 22, wherein the score comprises a trajectory waypoint score and wherein the set of selected images is determined based on an aggregation of the scores.